Improvement in riveting-machines



MPEIEHS, PHOTO-L THOGRAFMER WASHINGTON p C UNiTED STATES PATENT Ottica.

JAMES HOWELL AND DAVID BIRDSALI, OF JERSEY CITY, NEW JERSEY.

' IMPROVEMENT IN PttVETlNG-MACHINES.

Specification forming part of Letters Patent No. 42,375, dated Api il 19, 1864.,

.To all whom it may concern:

Be it known that we,JAMEs HOWELL and DAVID BrRDsALL, both of Jersey City, in tl e county ot umsonst-ate of New Jersey, have invented a new and Improved Machine for Riveting and Heading the Rivets of Steam- Boilers and other Articles; and we do hereby declare that the following is afull, clear, and exact description ofthe same, reference being had to the accompanying drawings, forming part of this specitication, in which- Figure l is a front view ot the machine. Fig. 2 is a vertical section ofthe same at right angles to Fig. l.

binnlar letters of reference indicate corresponding parts in both figures.

In this machine the riveting isperformed by a direct-acting or rectilinearly-moving hammer, which is raised or drawn back by one or more cams or wipers on a rotating shaft, and driven Vdown or forward upon the rivet by means of a spring, the work being placed over and supported by a stationary arm attached to the framing or standard of the machine.

One object of our invention is to dispense' the hammer andthe stationary arm, of two,

cup-shaped dies, one in the hammer and the other in the arm, to form a head on each side of thejoint by the action ofthe hammer.

The stationary arm of the machine is also iitted with a movable gage to insure the bringing of the centers of the rivets exactly under or opposite to the centers of the hammer and dies. l

We also provide certain means by which, after the hammer has been raised or drawn back by the action ot' the cams or wipers, it is held up or back out of the way of the stationary arm and lower die, to enable the work to be introduced to or moved in the machine.

To enable others skilled in the art to make and use our invention, we will proceed to describe its construction and operation.

A is astandard, which constitutes ihe main framing of the machine, intended to be bolted to a suitable bedvplate or foundation.

B is a frame, bolted to the front oi' the standard A, and containing or having attached to it the bearings for the horizontal rotary m ain shaft l C, and the vertical guides a a for the` hammer D, which consists of a straight rod of suitable length and thickness, having forged or other' wise secured upon it a collar, b, upon which the cams or wipers c c on the main shaft act to raise it preparatory to the production of the blow by the spring d, which is coiled around itbetween the said collar and the upper guide,

This arm is arranged so that a vertical planev passing longitudinally thrcugn its center will also pass through the center of the hammer. e and fare the two cup-shaped dies for upstting the two ends ot the rivets :and forming the heads, one secured in the lower end ot the hammer D, and the other in the stationary arm E, with their centers exactly opposite each other. These are intended to be movable to substitute others of different size or form.

gis the movable gage, over which. the holes near one edge of the plates to be riveted are placed, to enable the rivet-holes in the other edge of the plate to be brought exactly opposite to or concentric with the cup-shaped dies to insure the ends of the rivets being upset equally all around the holes. This gage is made with a turnedup end, to enter the rivetholes, and fitted to a groovein the arm E, and in order that its turnedup front end, over which the plates are hooked, may be drawn back close, or nearly so, to the standard A, the stem of the said gage is inserted through the said standard, and the gage is secu: ed in place by a set-screw or pin, It, behind the standard. On the top ot the trame B of the machine, behind the hammer, there is placed a stopcatch, F, which serves the purpose of' retaini ing the hammer in the highest position to which it is lifted by the cams c c, and thereby keeping it out of operation and securing it outof the way while the Work is being adjusted on the stationary arm, either preparatory to the commencementvof the riveting operation or to its repetition on a new rivet, also obviating the necessity of stopping the main shaft during' the shifting or adjustment of the work. Thiscatch vis represented as composed of a sto'utpiece'of spring-steel, which stands up to such a height that ashoulder, i, on the upper part of the hammer willjust come above its upper end when thc hammer is raised to its full height by the cams or wipers 'c c. ln the normal condition of `the said catch its point is just far enough back to allow the hammer to clear it,`as shown in Fig. 2 in black outline, and does notinterfere with movements of the hammer produced by the cams or Wipers andA the spring d but when itis desired to suspend the operation of the hammer, a slight forward movement ofthe said catch is sufficient to of the machine. The said lever works on a.

a fnlcrum-pimj, secured to the standard A, and ii'connected by a rod, 7c, with one arm ot" an e1- bow-lever, l,wl1 ich works on axed fulcru m, m, and tl. e other arm ot'which is connected bya rod, a, with the catch F. The front portion of the lever G worksin an I -Shaped slot,p,in a plate, l'I, secured to the front of the frame B, and a spring, g, is applied to press on one side of it in such manner as to force it toward that side of the slot on which is the oiiset. By pressing down the front end of the lever by hand to-the bottom ofthe slot p the catch F is thrown forward into contact with the hammer, so that the next time the hammer rises it iscaught up and secured in such manner that in their continued rotation with the main shaft the cams simply touch and pass by the shoulder b without producing any operation ofthe hammer. On letting go of the lever the spring g presses it into the oi'set of the i slot p, and so prevents it from rising, and

locks the catch F. When the hammer is to be set in operation, the lever is drawn out of the oiset of the slot, and the elasticity of the catch F throws it back from the hammer and raises up the lever Gr.

When the gage has been adjusted, and the work placed inl the machine, and up to the gage, as shown in red outline in Fig. 2, the rivet composed of a straight piece of rod or bar iron of proper size to tit the holes, having been heated to a weldingheat, is placed in those holes which have been brought under the hammer, and the machine is set inoperation by simply drawing the lever G out of the oiset portion of the slot p, and moving it up-V ward to withdraw the stop-catch F from the hammer. Thehammer, then rising and falling rapidly, quickly forms a head on the rivet both Y on the upper and or. the under side of thc plates, and the heads thus formed are made concentric with the holes and of a good shape` by means of the cupshaped dies ef in thehammer and stationaryarm. Whenthe riveting and heading of one rivet is tnished, the

lever G is pulled down and thecatch F again ,1

broughtinto operation to catch up thehammer and suspendits operation, and after the work has been moved to bring new holes into position a new rivet is put in and the operation repeated, as before described.

Havingnow described our invention, we will proceed to state what We claim and desire to secure by Letters Patent.

The combination of the trip-hammerl D, spring d, dies ef, gage g h, and the stop-catch evice F, when constructed and opera'ed substantially as described. f

JAMES HOWELL. DAVID BIRDSALL.

Witnesses:

D. ROBERTSON, v THos. S. J. DoUGLAs, 

